Birth, army career Maximus was born in
Gallaecia, Hispania, on the estates of
Count Theodosius (the Elder) of the
Theodosian dynasty, to whom he claimed to be related. In their youth, Maximus and Theodosius I served together in Theodosius the Elder's army in Britannia. Maximus would become a distinguished general in the following years; as he would gain the support of his fellow soldiers and the admiration of the Romano-Britons whom he defended, which would lead to his eventual immortalisation in Welsh legend in the centuries following. He served under Count Theodosius in Africa in 373. Assigned to Britain in 380, he defeated an incursion of the
Picts and
Scots in 381. but
Zosimus portrays him as inciting the troops to rebel against Gratian, as he was upset about Theodosius becoming emperor while he himself was not promoted. Stephen Williams and Gerard Friell preferred the latter version, based on the rapid success of the revolt. Maximus went to
Gaul to pursue his imperial ambitions, taking with him at least part of the Roman garrison in Britannia. Although many sources such as J. B. Bury claim he took most of the Roman troops with him, the number of troops withdrawn from Britain is unknown.
Administration Maximus made his capital at
Augusta Treverorum (Treves,
Trier) in Gaul, and ruled Britain, Gaul, and Spain. He issued coinage and a number of edicts reorganising Gaul's system of provinces. Some historians believe Maximus may have founded the office of the
Comes Britanniarum as well, although it was probably Stilicho who created the permanent office. Maximus was known as a persecutor of
heretics. It was on his orders that
Priscillian and six companions were executed for
heresy, although the actual civil charges laid by Maximus were for the practice of
magic. Prominent churchmen such as
St. Ambrose and
St. Martin of Tours protested against this involvement of the secular power in doctrinal matters, but the executions were carried out nonetheless. Maximus thereby not only established his credentials as an upholder of orthodoxy, but also strengthened his financial resources in the ensuing confiscations. The
Gallic Chronicle of 452 describes the Priscillianists as "Manichaeans", a different
Gnostic heresy already condemned in Roman law under
Diocletian, and states that Magnus Maximus had them "caught and exterminated with the greatest zeal". In a threatening letter addressed to Valentinian II, most likely composed between the spring of 384 and the summer of 387, Maximus complains of Valentinian's actions towards Ambrose and adherents of the
Nicene Creed, writing: "Can it be that Your Serenity, venerable to me, thinks that a religion which has once taken root in the minds of men, which God himself has established, can be uprooted?" in response to "the disturbance and convulsion of Catholic law." Conversely, Maximus's edict of 387/388, which censured Christians at Rome for burning down a Jewish
synagogue, was condemned by bishop
Ambrose, who said people exclaimed, "the emperor has become a Jew".
Final conflicts and execution In 387 Maximus, with a combined mix of frustration, fueled by
Justina’s religious policy in Mediolanum in attempting to make
Arianism coexist and even supersede Nicaean Christianity and the ambitions of his own mind for greater power within the Empire, launched a surprise invasion of Italy in 387. He managed to force emperor Valentinian II out of Mediolanum and the 16 year old emperor fled with his mother and court to Theodosius I, who treated them as honored guests, but gave them the cold shoulder for some time on the issue of restoring Valentinian’s rule in Italy. After becoming smitten by and marrying
Galla, the young daughter of Justina and sister of Valentinian II, the two emperors subsequently invaded from the east; their armies, led by
Richomeres and other generals, campaigned against Maximus in June–August 388. Maximus was defeated in the
Battle of Poetovio, and retreated to
Aquileia. Meanwhile, the
Franks under
Marcomer had taken the opportunity to invade northern Gaul during this period of civil war, further weakening Maximus's position.
Andragathius,
magister equitum of Maximus and the killer of the Emperor Gratian, was defeated near
Siscia, while Maximus's brother, Marcellinus, fell in battle at
Poetovio. Maximus surrendered in Aquileia and, although he pleaded for mercy, was executed. The Senate passed a decree of
Damnatio memoriae against him, but his mother and at least two daughters were spared. Theodosius's trusted general
Arbogast executed Maximus's son,
Victor, at
Trier in autumn of the same year.
Fate of family Magnus Maximus is known to have had a wife, who is recorded as having sought spiritual counsel from
St. Martin of Tours during his time at Trier. Her name and her fate after Maximus's downfall have not been preserved in definitive historical records (but see the Welsh tradition below). Unlike his son Victor, Maximus's unnamed mother and daughters were spared by Theodosius I; the daughters were sent to a relative and the mother was given a pension. One of Maximus's daughters may have been married to
Ennodius, proconsul Africae (395). Ennodius's grandson was
Petronius Maximus, another ill-fated emperor, who ruled in Rome for only 77 days before he was stoned to death while fleeing from the Vandals on 24 May 455. Other descendants of Ennodius, and thus possibly of Maximus, included
Anicius Olybrius, emperor in 472, but also several consuls and bishops such as
St. Magnus Felix Ennodius (Bishop of
Pavia – 521). We also encounter an otherwise unrecorded daughter of Magnus Maximus,
Sevira, on the
Pillar of Eliseg (9th century), an early medieval inscribed stone in Wales, which claims that she married
Vortigern,
king of the Britons. == Role in British and Breton history ==